Spy object by Mockito in Spring

Question

When I try to Spy an object in my unit test, I got an exception. This is my unit test file:

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:spring/applicationContext.xml" })
public class BookingSuperManTest {
    BookInfoParams bookInfoParams; 
    HttpAttributeParams httpAttributeParams;
    AbstractRequester requester;
    public void beforeStartTest(){
        bookInfoParams = Mockito.spy(new BookInfoParams());
        httpAttributeParams = Mockito.spy(new HttpAttributeParams());
    }
    @Test
    public void step1GoToHomePage() throws BookingException{
        beforeStartTest();

        requester = new Step1HomePage(bookInfoParams, httpAttributeParams);
        requester.executeRequest();

        Assert.assertNotNull(httpAttributeParams.getResponseGetRequest());
    }
}

I got the exception at the link assign bookInfoParams spy:

java.lang.NoClassDefFoundError: org/mockito/cglib/proxy/MethodInterceptor
    at org.powermock.api.mockito.internal.mockmaker.PowerMockMaker.<init>(PowerMockMaker.java:43)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    at java.lang.Class.newInstance(Class.java:379)
    at org.mockito.internal.configuration.plugins.PluginLoader.loadImpl(PluginLoader.java:61)
    at org.mockito.internal.configuration.plugins.PluginLoader.loadPlugin(PluginLoader.java:24)
    at org.mockito.internal.configuration.plugins.PluginRegistry.<init>(PluginRegistry.java:13)
    at org.mockito.internal.configuration.plugins.Plugins.<clinit>(Plugins.java:12)
    at org.mockito.internal.util.MockUtil.<clinit>(MockUtil.java:23)
    at org.mockito.internal.MockitoCore.<init>(MockitoCore.java:40)
    at org.mockito.Mockito.<clinit>(Mockito.java:1103)
    at ive.core.test.webbot.book.vietjet.BookingSuperManTest.beforeStartTest(BookingSuperManTest.java:46)
    at ive.core.test.webbot.book.vietjet.BookingSuperManTest.step1GoToHomePage(BookingSuperManTest.java:54)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:73)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:82)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:73)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:224)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:83)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:68)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:163)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: org.mockito.cglib.proxy.MethodInterceptor
    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    ... 44 more

This is the dependencies in my pom file

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
</dependency>
<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-core</artifactId>
    <version>2.0.44-beta</version>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-api-mockito</artifactId>
    <version>1.6.4</version>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>1.6.4</version>
</dependency>
<dependency>
    <groupId>cglib</groupId>
    <artifactId>cglib</artifactId>
    <version>3.2.1</version>
    <scope>test</scope>
</dependency>

Maybe the version is not compatible or I missed something ?

Answer 1

It might be problem with the dependencies. The powermock-api-mockito has compile time dependency on mockito-core version 1.10.19, but you have also defined a dependency on version 2.0.44-beta. This might be a classpath problem. Try removing the explicit dependency on version 2.0.44-beta.

Answer 2

In the release 2.0.32-beta Mockito team moved cglib classes into separated jar. But PowerMock still depends on classes which have been moved, so you get java.lang.NoClassDefFoundError.

In release 1.6.2 Mockito classes was copied into PowerMock, but not all. As workaround I may suggest clone, build and add to classpath the mockito-cglib (https://github.com/mockito/mockito-cglib).

The PowerMock will have supported Mockito 2 API since 1.6.5 which will have been released by the end of the May, but will still use cglib. The full Mockito 2 with Bytebuddy will be supported in release after 1.6.5.

Developer Guide for Migration to Mockito 2

Answer 3

Use powermock-api-mockito2 if you are using 2.x.x version of mockito-core as powermock-api-mockito is not compatible with mockito-core 2.